Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to figure out when it's possible to plant dipladenia by reviewing the USDA zone info for Grafton.

Planting Calendar for Dipladenia

Frost tolerance for dipladenia:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Dipladenia require warm weather which means that you need to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant dipladenia in Grafton is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant dipladenia and expect a good harvest is probably August. Any later than that and your dipladenia may not have a chance to fully mature. You can get started a little bit earlier by starting your dipladenia indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Grafton. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Grafton may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Grafton last frost occurs after April 15 so be sure to be ready to protect your dipladenia if you have a late frost.

USDA Zone Info for Grafton

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Grafton

You may be interested in your other planting guides for Grafton.